Ubuntu Security Notice USN-1312-1
19th December, 2011
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.04
Several security issues were fixed in the kernel.
- linux - Linux kernel
A bug was discovered in the XFS filesystem's handling of pathnames. A local
attacker could exploit this to crash the system, leading to a denial of
service, or gain root privileges. (CVE-2011-4077)
Nick Bowler discovered the kernel GHASH message digest algorithm
incorrectly handled error conditions. A local attacker could exploit this
to cause a kernel oops. (CVE-2011-4081)
A flaw was found in the Journaling Block Device (JBD). A local attacker
able to mount ext3 or ext4 file systems could exploit this to crash the
system, leading to a denial of service. (CVE-2011-4132)
Clement Lecigne discovered a bug in the HFS file system bounds checking.
When a malformed HFS file system is mounted a local user could crash the
system or gain root privileges. (CVE-2011-4330)
The problem can be corrected by updating your system to the following package version:
- Ubuntu 11.04:
- linux-image-2.6.38-13-powerpc 2.6.38-13.53
- linux-image-2.6.38-13-powerpc64-smp 2.6.38-13.53
- linux-image-2.6.38-13-generic-pae 2.6.38-13.53
- linux-image-2.6.38-13-versatile 2.6.38-13.53
- linux-image-2.6.38-13-generic 2.6.38-13.53
- linux-image-2.6.38-13-virtual 2.6.38-13.53
- linux-image-2.6.38-13-server 2.6.38-13.53
- linux-image-2.6.38-13-omap 2.6.38-13.53
- linux-image-2.6.38-13-powerpc-smp 2.6.38-13.53
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to reboot your computer to make
all the necessary changes.